Equine Herpes Myeloencephalopathy (EHM) Updates:

 

RELEASED: EHV-1 Quarantine in Santa Clara County

April 7, 2021: No additional cases to report. As there were no additional cases for fourteen (14) days on the home premises, the quarantine was released.

April 1, 2021: No additional cases to report. CDFA continues to monitor the situation closely.

March 24, 2021: A 21-year-old Quarter Horse mare from Santa Clara County displaying neurological signs was confirmed positive for Equine Herpesvirus-1 on March 23rd. The horse is alive and is being treated in isolation at a veterinary hospital. The home premises has been quarantined with enhanced biosecurity measures in place and twice daily temperature monitoring. The clinical horse has no recent travel history and no links to any other EHV-1 cases. The home premises hosted an event on March 21st, and one asymptomatic horse from the home premise competed in an event from March 19th – 21st.  Event managers have been notified, and are encouraging all owners of potentially exposed horses to perform twice daily temperature monitoring, limit movement, and practice enhanced biosecurity measures for the next 14 days. CDFA will be onsite and continue to actively monitor exposed horses.

 

RELEASED: EHV-1 Quarantine in Sonoma County

March 29, 2021: No additional cases to report. As there were no additional cases for fourteen (14) days on the home premises, the quarantine was released.

March 22, 2021: No additional cases to report. CDFA continues to monitor the situation closely.

March 16, 2021: A 21-year-old Warmblood mare from Sonoma County displaying neurological signs was confirmed positive for Equine Herpesvirus-1 (neuropathogenic strain) on March 15th; the horse is alive and is being treated in isolation at a veterinary hospital. Horses on the home premises have been quarantined with enhanced biosecurity measures and twice daily temperature monitoring. There is no known risk of exposure out of this facility to any local events. The clinical horse has no recent travel history and no links to any other EHV-1 cases. CDFA will continue to actively monitor exposed horses.

 

RELEASED: EHV-1 Quarantine in San Bernardino County

March 29, 2021: No additional cases to report. As there were no additional cases for fourteen (14) days on the home premises, the quarantine was released.

March 22, 2021: No additional cases to report. CDFA continues to monitor the situation closely.

March 16, 2021: A 10-year-old Arabian gelding in San Bernardino county displaying neurological signs was confirmed positive for Equine Herpesvirus-1 (EHV-1 non-neuropathogenic strain); the horse is alive and under veterinary care. One additional horse on the property tested positive for EHV-1 with neurological signs and was euthanized due to the severity of clinical signs. Following an assessment of the home premises in San Bernardino County by CDFA personnel, twenty-two (22) potentially exposed equids have been quarantined with enhanced biosecurity measures and twice daily temperature monitoring. This premises is a private facility with no recent movement on or off the property and these cases have no known links to any other EHV-1 cases. CDFA will continue to actively monitor exposed equids.

 

RELEASED: EHV-1 Quarantine in Los Angeles County

 

April 2, 2021: The index horse met the parameters of receiving two (2) negative tests seven (7) days apart so the quarantine has been released.

March 24, 2021: As there were no additional cases for fourteen (14) days on the home premises, the quarantine for the boarding facility has been released. The initial index horse remains positive on testing for EHV-1 so will continue its quarantine at its isolation premises until it has two (2) negative tests seven (7) days apart. 

March 22, 2021: No additional cases to report. CDFA continues to monitor the situation closely.

March 15, 2021: No additional cases to report. CDFA continues to monitor the situation closely.

March 10, 2021: A 20-year-old Warmblood gelding in Los Angeles County displaying neurological signs was confirmed positive for Equine Herpesvirus-1 (EHV-1 non-neuropathogenic strain) on March 9th; the horse is alive and under veterinary care. Following an assessment of the home premises in Los Angeles County by CDFA personnel, forty-two (42) potentially exposed horses have been quarantined with enhanced biosecurity measures and twice daily temperature monitoring. The owners of all exposed horses have been notified and no additional cases have been identified at this time. CDFA will continue to actively monitor exposed horses.

RELEASED: EHV-1 Quarantine in Los Angeles County

February 26, 2021: No additional cases to report. As there were no additional cases for fourteen (14) days on the home premises, the quarantine was released. There are no current EHM quarantines in California.

February 22, 2021: No additional cases to report. CDFA continues to monitor the situation closely.

February 17, 2021: No additional cases to report. CDFA continues to monitor the situation closely.

February 12, 2021: An 11-year-old Tennessee Walking horse gelding in Los Angeles County displaying neurological signs was confirmed positive for Equine Herpesvirus-1 (EHV-1 non-neuropathogenic strain) on February 11th. The gelding was euthanized due to the severity of neurologic signs on February 7th. Seventy-two (72) potentially exposed horses at his home premises in Los Angeles County have been quarantined with enhanced biosecurity measures implemented, including twice daily temperature monitoring following site assessment by CDFA personnel. All horses on the premises had no recent show or travel history and all owners of exposed horses have been notified. No additional cases have been identified at this time, and CDFA will continue to actively monitor the situation.